Code reviewMediumcr-g070

Subject Unnecessary allocationLevel Mid–Senior~20 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

Review this Java CSV exporter.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix — specific and kind.

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Code to reviewjava

1public String toCsv(List<Record> records) {2    String out = "id,name,amount\n";3    for (Record r : records) {4        out += r.getId() + ","5             + r.getName() + ","6             + r.getAmount() + "\n";7    }8    return out;9}10 11public void writeExport(List<Record> records, Path file) throws IOException {12    Files.writeString(file, toCsv(records));13}

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